Garage ceiling ducts

I have a cold room above the garage is I ripped out the garage drywall ceiling and found insulation behind the drywall, plastic wrap, then an empty or open 2ft cavity with the copper bathroom water pipes, toilet an sink drain pipes and 3 heating ducts that supply the room. There is also one open duct that just heats the open cavity between the sub floor and plastic wrap / insulation. Is this normal?

I am going to get the garage ceiling spray foamed but what do I do with this duct?

None of the ducts are wrapped and the insulation job was terrible so I am sure this is why my room is 5-7 degrees colder and it takes 5 minutes until warm air comes out of the vent.

 

Insulation in the garage ceiling is always lacking and is a valid concern.

You mentioned spray foam insulation. Why not have the duct sealed in the spray foam too ?

 

Hi, that is exactly what I am going to do. Seal the ducts, and everything between the joists.

Would i be better off just sealing the open duct, removing the feed from the furnace all together or redirect it into the bedroom above cutting a hole in the floor adding a vent etc. Having 4 instead of 3 vents in the bedroom?

 

Four supply vents in one bedroom would be pretty excessive.

Without knowing how your ductwork is setup it can be a hard question to answer.

 

Not too sure myself either.

The only reason I would entertain another register in the room is because there is one in the closet and two located on the far side of the room at the front of the house which span whole length of the garage ceiling.

These two ducts are not even straight, they run half way along the ceiling, are elbowed, then span the rest of the ceiling to the front corners of the room. (not sure If that matters or not).

Since two span the garage the airflow isn't as much as I would like to be.

 

If it would be in a decent location, I would add the vent. Maybe down the road you close the louvers on it or another one but at least you would have the option. Any cold air returns in there? If not, now would be the time to add one or three.

 

There is no cold air return at all which I would think is a no-no. I am guessing that the heat supply is to counteract the cold floors above the garage instead of properly insulating them.

I would need to do some minor duct work to put the vent into a desired location but nothing I couldn't handle. Like you said, I can always cap it off if I don’t need it.
I think I will double check with the insulation team to see if the garage ceiling actually needs a vent to heat the cavity between the foam and the drywall but I doubt it.

I watched the “Cold Feet” episode Mike Holmes did and I have the same setup with the same cavity vent but Mike never actually said what he did but I think he sealed it off.

 

Turns out that there was a hidden cold air return behind a bunch of stuff I didn't see until I took the vapor barrier out. Not sure what to do now, maybe see what the insulation guys recommend. I am sure they have delt with this many of times.